Improvement in planing-machin es



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A M. PHTO-LITHU. C0. MY. (OSBORNE'S PROCESS) UNITED STATESA PATENT'OFFICEo HENRY A. LEE, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN PLANlNG-MACHINES.

Specification forming part of Letters Patent No. 48, l S5, dated June13, 1865.

To all 'whom 'it may concern:

Be it known that I, HENRY A. LEE, of the city and county ot' Vorcester,and State of Massachusetts, haveinvented certa-in new and usefulImprovements in Molding-Machines; and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation ot' the same, referenceV being had' to the accompanyingdrawings, in Which- Figure l represents a longitudinal vertical` sectionthrough 'said molding-machine. Fig. Figs. 3 and 4 representdetachedviews, hereinafter to be referred to.

My invention relates to certain improvements on the molding-machinepatented by me October 13, 1863.

. To enable others skilled in the art to make and use my invention,Iwillproceed to describe i its construction andtoperation.

A represents the main frame ot' the machine. `IB represents the table orbed-plate on which Vthe articles to be molded are supported.`

C represents the vertical cutter-heads, the

cutters of which operate upon the edges ot' the ofthe verticalcutter-heads, to hold and conduct the stu' while the cutters are atwork.

To make this operation more perfect I use an additional pair offeed-rolls, G, which act upon the stuff in conjunction with thefeed-rolls F; but by having the feed-rolls G between the cutter-heads Ctheir action greatly insures not only the feed of the material, but alsothe direct-ion in which the stuit' is fed by pressing it more rmlyagainst the guides or rests H.

I and K represent horizontal pressure-bars, which are supported onadjustable stands Land M in front and to the rear of the horizontalcutter-cylinder D. They are provided respectively with shoes N and O,which press the stuff iirmly to the bed while it is acted upon by thecutters ot' the cylinder, and it is very essential to a i'iert'ectoperation ot the machine that these pressure-bars and shoes should beset as closely to the cylinder as the length ot' the revolving cutterspermits. For this purpose the bolts a, b v which the stands L aresecured to the bed-plate, pass tllroughslots b of the bed-plate, and Ialso secure the stands M ot' the bar K to the tra me ot' thecutter-cylinder by means ot` slotted ilanges or lugs d., through whichthe bolts f pass. Thus the frames or stands of both pressure-bars aremade adjustable from and toward the cutter-cylinder D. The height ofthepressure-bars K I and their shoesN O is made adjustable by means ofthescrew-rods P, the heads g ot which rest upon the framesM It, while thescrew-spindles pass loosely through said frames and through the ends ofthe pressure-bars I K, but work in the screw-nuts m, Fig. 3, which areset upon the upper and lower sides of the ends ot the pressure-bars. Thescrew-spindles P ot the fra-me L extend downward beneath the bed-plate,where to each of' them a weigpted lever, Q., is secured, the frontpoint, h., of which bears against a projection,t`,of the mainframe,wh`ilc the weight R presses the long arm of the lever downward,and thus causes the shoe N to press upon the stuft'. arrangement thepressure of the shoe N upon the stuft' is the same, whether the trame Lis moved from or to the cylinder D, as thcleverage of the lever Qremains unchanged, owing to the fact that the spindles P can be movedfreely through the slot in the bed-plate, while the point h of thelever, which constitutes its bearing, can slide on the lower edge ot'the projection 1I.

As shown at Fig. 4, the ends ofthe pressure bars K I, which are incontact with the screw nuts m, are rounded off. This is for the purposeof enabling said 'pressure-bars and their shoes to assume obliquepositions in case the stuE to be acted upon should be thicker on oneedge than on the other, so that it will be iirmly pressed upon thebed-plate, which would not be the case it' the pressure-bar could notdeviate from its horizontal position, in which latter case it would bearupon one edge only of the stuit'.

As the machine should be adapted to Work stuft' of different dimensions,and with the ap- It will be noticed that by this plication of cutters ofvarious sizes, it is desirable to make the bearing of the.cylinder-.cutterD adjustable, sothat said cylinder can either be securedat any desirable height, or so that it can be moved while working tooperate upon stuit whose thickness is variable. This I effect bysecuring the journal-boxes S of the cylinder-cutter upon its frame orstand T by means of screws which pass through slots o in the frame, asshown at Fig. 3, and said screws are to be tightened when the cylinderis to be secured at a certain height.

E represents the cutter-cylinder, which is used for planing the lowerside of the stuit. On thiscutter-c linder I use knivesfor thepurposeofspringing moldings upon the under corners of the stutf which is notrequired'to be planed on the under side. rIhis operation has beenperformed heretofore by means ot' suitable cutters attached to thevertical cutter-heads, and has been attended w-ith diiticulty, inasmuchas the points ot' the cutters, when so fastened and operated, are liableto become dull and worn off, thus leaving the molding in a roughcondition. By my arrangement such molding can be sprung with ease andneatness; but as the cutters employ ed for this purpose have to be ofgreater length than those used for planing the bottom, it is evidentthat the aperture or mouth in the bed-plate in which the cutters revolvemust be enlarged. This is attended with the difficulty that thin stutfcannot be properly worked on a large mouth ofthe bed-plate, as itspringsy and yields too much. l To avoid this difficulty I use anadjustable mouth in the bed-plate, which consists ot` the pieces p,which are inserted into the bed-plate 'when thin stuft' is operated uponon which no moldingV is sprung on the lower corners, but which areremoved when the latter operation is to be performed, and a wide mouth,q, is left open, through which cutters of suflicient length can operateto spring moldings upon the lower corners. l

In that class of work where the molding is sprung upon the under cornersitis not necessary to planethe undersurt'ace, as that is placed V nextto the building and is not seen, the top vand sidesonlybeingexposed. Asbefore stated, the only plan adopted prior to my invention was to placethe cutters upon upright heads; but as such cutters, when so placed,were constantly working against the grit and dust on the board or stuft'they soon became rough or worn olf, so that the molding was left in animperfect condition. By my plan the cutters Working up againstV theadvance ot' the stuft' always keep sharp and leave the moldings smoothand true. Another advantage of my improvement consistsin the fact thatthe moldings are to be cut at the same time that the upper face and thesides are Worked or molded.

Having thus. fully described the'nature of my invention, what Iclaimherein as new, and desire to secure by Letters Patent, is-

l. The combination, with the horizontal cutter-cylinder of amolding-machine, of an adjustable automatic press ure-stand, whereby thepressure of theshoe upon the stuft' remains the same, whether the standis removed to or from the cylinder, substantially as and for thepurposes stated.

2. The combination, with the adj ustable stand L, ot'pressure-bar I,screw-shat'tP, and Weighted leversQ, substantially as and for thepurposes specified.

8. In combination with the adjustable pressure-bars K, the adjListing-screws P andrscrewnuts m, operating against the rounded ends ot'thebar K, as and for the purpose specified.

4. In combination with the stand M, the slotted flanges d, when securedto the standard T ofthe cutter-cylinder D, to make it adjustablethereon, as and for the purposes specilied.

5. In combination with the cutter-cylinder E, Working under the bed B,the adjustable mouth-piece p in the bed-plate, by whichmoldings can becut on thelower corners ot' the stuiie while the sides and face areWorked,as herein shown and described.

HENRY A. LEE. Witnesses:

THos. H. DODGE, GEO. H. MILLER.

